Condenser



CONDENSER Filed July 30. 1923 Patented Sept. 25, 1923.

CLARENCE D. TUSKA, 0F HARTFORD, CONNECTICUT.

CONDENSER.

Application led July 30, 1923l Serial No. 654,753.

To all whom it may coment:

Be it known that I, CLARENCE D. TUsKA, a citizen of the United States,residing at Hartford, in the county ofHartford and State of Connecticut,have invented certain new and useful Improvements in Condensers,'ofwhich the following is a specification, the same being a continuance ofmy application, Serial No. 620,534, filed February` 21, 1923.

his invention relates to condensers. A.

condenser involving the invention may be employed with utility invarious Ways in the electric and allied arts, althou h in practice ithas demonstrated particu ar advantage as part of the equipment of awireless telegraph station. I have several objects in view, among theprincipal of them being the provision of an appliance of the characterset forth, which is capable of inexpensive production, Without in anywise affecting its proper action. The device is comparatively light, yetstrong, and it can be readily and easily operated to adjust or regulateits capacity. It may be constructed in various ways. In the drawingsaccompanying and forming part of the present'specification, I have|illustrated and will hereinafter describe in detail one ofthe many formsof the invention. This disclosure is primarily made to enable thoseskilled in the art to practice the invention. I am not restrictedthereto. I may in fact depart therefrom in several particulars withinthe scope of the invention defined by the claims following saiddescription.

Referring to said drawings- Figure 1 is a plan View of a form of mycondenser;

Fig. 2 is an elevation of the form shown in Fig. 1. n

Like characters refer to like parts throughout the several views whichare on different scales.

The condenser involves in its makeup at least two elements which arerelatively adjustableto vary capacity. This relative adjustment, as willbe inferred, may be obtained in various Ways. Usually, it isaccomplished by the adjustment of one of the members or elements withrespect to the other, yet this may not be necessary in all cases? Atleast one or both of these elements comprises a plurality of portionsdesirably flexible. For illustration, I have obtained excellent resultsby making one portion, that is the insulating portion .of some flexiblematerial such as paper stock of which there are several kinds. I mightnote at this juncture that paper sheet material or thin board answersquite satisfactorily indeed. Likewise, the conducting part or portion ofeach element may vary. Satisfactory results have been obtained by theutilization of foil, such as tin-foil. Each portion or part, therefore,of each member or element, as I have considered the same, of thecondenser is thus flexible..

lVith the foregoing observations, I will now describe more definitelythe structure shown. 1

In Figs. 1 and 2 I show a flat construction. The bases' in this type isdenoted by 20 and the elements or members of the active condensingportion by 21 `and 22 respectively. In this kind of condenser the member-21 is practically of half disk formation, the member 22 being acomplete disk. Said member 21 consists of superposed half disks 23 and24 of paper andan interposed half disk sheet 25 of tin-foil, thetin-foil being so disposed between the paper sheets 23 and 24 that therewill be a selvage or marginal portion of paper material entirely aroundthe tin-foil. The adjustable member 22 of disk form is fastened to thespindle 26 supported for turning movement by the base 20. The spindle 26has a manipulating knob or finger piece 27 at its other end tofacilitate its adjustment. This spindle rotates freely in the member 21.Through the member 22 the spindle 26 fixedly extends. This member 22consists as shown Vof disks 23 and 24 and an interposed half disk 25 oftin-foil.

In order to show the construction illustrated in Figs. land 2 it hasbeen necessary to separate the elements of the condenser 'much furtherthan actually occurs in practice. For instance, in a condenser having acapacity of .0002 M. F. the stationary elements of the condenserrepresented by the numeral 21 would present a practically fiat uppersurface because the half disk sheet 25 of tin-foil would be only .001,5inch thick.

The paper and tin-foil are usually adhesively united in some convenientway. Although the paper stock Whollycovers and encloses the tin-foil,this may not always be necessary. In this articular construction shown,the twov tinoil portions are illustrated out of register with eachother, so that thereby I secure the minimum capacity of the condenser.By moving the tin-foil sheets into register, the capacity of thecondenser may be made maximum; this capacity may obviously be adjustedto any point from zero to the maximum, byturning the movable element.

The lower face 23 of the upper or adjustable elements designated by thenumeral 22 would also have a substantially flat lower face which wouldpractically engage the upper face 24 of the member 21. Therefore, thespace 26 as shown in Fig. 6, if existing at all in practice, would beexceedingly minute.

It will further be observed that the' adjustable member 22 is, as awhole, flexible, and therefore readily conforms itself to any inequalityin the upper surface of the member 2l.

It is obvious that this form of condenser may be so constructed that thespindle 26 need not be in electrical contact with either of the activeconducting plates of the condenser which may be provided with any formof suiable terminals, not shown.

l. In a variable condenser. a plate comprising a pair of thin flexiblediscs of dielectric material and a sheet of metallic foill between saiddiscs, and a second conducting platel in superposed relation to saidfirst mentioned plate, one of said plates being movable with respect tothe other.

2. In a variable condenser, a fixed plate' comprising a pair of thinflexible dielectric discs and a sheet of metallic foil interposedbetween said discs, a rotatable metallic plate in superposed relation tosaid fixed plate, and means for rotating said rotatable plate.

3. In a variable condenser, an adjustable flexible element adapted forcircular rotation in a fixed plane comprising, a flexible conductingsheet and flexible non-conducting sheets on both faces thereof.

4. In a variable condenser, an adjustable flxible electrode memberadapted for circular rotation in a fixed plane having conducting sheetof metallic foil and a flexible covering of non-conducting material onboth faces thereof.

5. In a variable condenser, an adjustable electrode member comprisig, apair of superposed flexible non-conducting discs and a sheet of metalfoil interposed between said discs,

6. In a variable condenser, a fixed element, and a flexible rotatableelement comprising, a thinflexible metallic disc and flexible sheets ofinsulating material on both sides of and attached to the metallic dise.

7. A variable condenser comprising, a flat immovable fixed electrode, aninsulating layer adjacent thereto and carried by the support for thecondenser, an electrode comprising a flexible metallic plate, and meansfor moving the flexible plate to vary the capacity of the condenser.

8. A variable condenser comprising, a flat immovable fixed conductingelectrode, an insulating layer adjacent thereto and car- .ried by thesupport for the condenser, and

a flexible electrode relatively movable with respect to the firstmentioned electrode.

9. A variable condenser comprising, a flat immovable conducting sheet,an insulating layer adjacent thereto and upon which the surface of theconducting sheet is adapted to contact, said insulating layer beingcarried by the support for the condenser, and a movable flexibleconducting element for varying the capacity of the condenser.

In testimony whereof I affix my signature,

CLARENCE D. TUSKA.

